Footing Bearing Pressure Calculator

Calculate contact pressure under footings: q = P/A (concentric), q = P/A ± M·c/I (eccentric). Kern of footing: e < B/6 to prevent tension. Compare to allowable bearing capacity from soil investigation.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How It Works

Calculate contact pressure under footings: q = P/A (concentric), q = P/A ± M·c/I (eccentric). Kern of footing: e < B/6 to prevent tension. Compare to allowable bearing capacity from soil investigation

Each component has a specific meaning:

  • Soil investigation — The soil investigation recorded for the patient or scenario being assessed.

Note: Interpret the footing bearing result against the clinical thresholds and context described above.

How to Use

Enter the soil investigation for the patient or scenario you are assessing. Calculate contact pressure under footings: q = P/A (concentric), q = P/A ± M·c/I (eccentric). Kern of footing: e < B/6 to prevent tension. Compare to allowable bearing capacity from soil investigation. Use the footing bearing result to inform your clinical assessment.

Frequently Asked Questions